Botan

a guide to the Spirit World and close friend to Yusuke Urameshi. She is a spirit charged with ferrying souls of the deceased to the Spirit World to face their final judgment. As opposed to the idea of there only being a single one, she is one of many grim reapers.

She is the one assigned to guide Yusuke in his test so his soul can come back again to his body, thereby resurrecting him. At first, she is somewhat skeptical of Yusuke but finally came to realize that Yusuke really has a good heart. When Keiko grew worried when her mother fell ill and decided to stay with her the whole night and thereby jeopardized the last requirement Yusuke needs to be revived, Botan possessed Keiko's mother's body and tells her that Yusuke needs her more at the moment. This prompted Keiko to rush back to Yusuke's house to kiss his body just in time.

After Yusuke's revival, Yusuke is surprised to notice a demon inhabiting the body of a street punk he just beat. Botan shows up and tells Yusuke that his experience with death and with his special ability, he is able to see them. Yusuke is now thus chosen as a Spirit Detective of the Spirit World. She acts as Yusuke's assistant and trainer as he starts out his tenure as underworld detective. She takes a form of a human being in order to do this. She is one who usually gives Yusuke his missions as a Spirit Detective. She teaches him how to use various detective tools, communicates messages from Koenma, and often guides him to different destinations pertaining to his cases. She gave him the Psychic Spyglass, the Demon Compass, the Concentration Ring, and the Communication Mirror. Flight: As a navigator of the River Styx, she manifests an oar for quick travel through flight, as well as transportation between Human World and Spirit World.
Spiritual Power: Botan has mild healing abilities, which include slowing down the rate of demonification, but not enough to completely stop or reverse it.
Physical Power: She is seen using a baseball bat, a mop, and bug spray as weapons during the Maze Castle incident.
Telepathy: She has displayed the ability to read minds early on in the series.

Although she is a Grim Reaper, she looks nothing like what people usually imagine. Botan has long cyan (light-blue) hair pulled up into a ponytail and light purple eyes (blue in the manga). In the manga tankōbon covers, she has blonde hair and green eyes. Her physical appearance generally doesn't change, but at the end of the series her ponytail and bangs have grown a bit longer. She is usually clad in a light-pink kimono with a white obi sash when on duty, but she has also been known to wear human clothes. When she's masquerading as the Urameshi team's trainer during the Dark tournament, she dresses formally with a long-sleeve yellow shirt with an orange-yellow camisole underneath, brown slacks, and matching shoes. Early in the series, she disguises herself in the uniform for Sarayashiki Junior High girls, a blue blouse with a yellow scarf with a blue skirt, usually with white socks or knee socks and dark-colored dress shoes.

Botan is genuinely helpful and well-meaning, while also somewhat clumsy and short-sighted. She's also bubbly and has a cheery demeanor, while cautiously optimistic, but can also be a bit of a scaredy-cat. She sometimes tends to be a motormouth. She used to view Yusuke as an interesting subject to study until she develops a bond with him, and becomes a valuable ally and close friend. Later, as Yusuke teamed up with Kuwabara, Hiei, and Kurama, Botan helps the whole team as well.